Thirds to frederick boardman and samuel n



(No Model-T,

- W. STOKES.

KNURLING TO0L.

Patented Oct. 10, 1882..

N. PETERS, PMa-unw m mr. Washinginn, 9.6.

UNITED STATES PATENT OFFICE.

WVILLIAM STOKES, OF MANSFIELD, MASSACHUSETTS, ASSIGNOE OF TWO- THIRDS TO FREDERICK BOAEDMAN AND SAMUEL N. STONE, BOTH OF SAME PLACE.

KNURLlNG-TOOL.

SPECIFICATION forming part of Letters Patent No. 265,711, dated October 10, 1882.

Application filed February 20, 1882. (No model.)

To all whom it may concern:

Be it known that-I, WILLIAM STOKES, of Mansfield, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Knurling-Tools, of which the following is a full, clear, concise, and exact description, reference being bad to the accompanying drawings, making apart hereof.

The object of my invention is to furnish a holding-stock for knurling-tools, which allows a change in rollers to be easily and quickly made.

My invention consists, first, in making the stock in two parts, one of which may be easily moved to effect a change in rollers; and, secondly, in combining therewith a locking device i'or holding the movable piece in place.

In the drawings, Figure-l is a side elevation of a knurling tool, showing my invention. Fig. 2 is a cross-section on lme w 00 of Fig. 1. Fig. 3 is a cross-section on line 3 y of Fig. 2, showing one form of the locking device for holding the movable piece in place. Fig. 4 is a'detail of the locking device shown in Fig. 3.

A is the movable piece, connected with the handle H by the guide (I. This guide may be of the form shown in Fig.1,slidingin a groove transversely to the length of the handle; or it may be like a tang sliding in a socket in the end of the handle, as shown in Fig. 6. The

pin a assists to hold the movable arm A more steadily. The spindle b may be attached to either the fixed or the movable arm. When the roller 0 is placed on the spindle and the arm Ais adjusted, it is held firmly in place by a locking device, f, preferably of the kind shown in Fig. 4, which consists of an eccentric cam turning in a socket in the side of the stock and bearing against the guided. By turning the eccentric cam f in its socket the movable arm Ais loosened and thrown outby the spring 8.

Figs. 5 and 6 show another form of locking device, which consists of a common springcatch.

What I claim as my invention is 1. The improved knurling-tool above described, having a stock in which one of the arms'is separable for the purpose of removing and replacing the roller, substantially as set forth. 7

2. A kn urlin g-tool having a movable arm, A, in combination with a locking device for holding the movable arm in position, substantially as described.

WILLIAM STOKES.

Witnesses:

STEPHEN F. KEACH, WM. A. GUPELAND. 

